﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Program09
{
    class Program
    {
        static void Main(string[] args)
        {
            //string str1 = "a";
            //string str2 = "b";
            //string str3 = "c";
            //string sum = "";
            //for (; ; )
            //{
            //    sum = str1 + str2 + str3;
            //}
            //Console.WriteLine(sum);
            Console.ReadLine();
        }
        public static string Pwd()
        {

            return "";
        }
    }
}
